Add an ExtraContextMixin
Merge branch 'master' into feature/extracontextmixin
Some PEP8. Allow extra_context to be dict or list of two tuples. More tests.
Docs make a little more sense. Not complete yet.
Clean up errors.
Docs.
Close backticks.
Rename mixin to static rather than extra. Makes more sense.
Merge branch 'master' into feature/extracontextmixin
Merge pull request #113 from brack3t/feature/extracontextmixin

Feature/extracontextmixin